package com.zgc.simpleholiday;

public class simple {


    public static void main(String[] args) {
        String a = null;

        switch (a) {
            case "1":
                System.out.println("1");
                break;
            case "2":
                System.out.println("2");
                break;
            default:
                System.out.println("default");
        }
    }
}
